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Cannot install audio driver in Windows 7 Ultimate (64-bit)

I just finished re-building my computer and performed a clean install of Windows 7 Ultimate (64-bit). I have not had any trouble getting any of the other device driver to install, but my audio does not work. When I mouse over the volume icon in my notification area, it says "No Audio Output Device is installed." I checked Device Manager and there are no missing drivers. The only thing in Device Manager that looks like anything audio related is the "High Definition Audio Controller".

I looked on the Intel support forums for an updated driver and found one that was for Windows XP/Vista. I tried to install it, but it said that the hardware was unsupported by the installation package. I have also tried to run the driver installer in compatibility mode for both XP SP3 and Vista SP1 & SP2, with no results.

I checked around on some other forums as well and saw a recommendation to update the chipset driver, which I have done. All other drivers and the system BIOS were updated to the latest versions. I also checked in BIOS and the audio is enabled. Also, another recommendation that I have tried is to uninstall the "High Definition Audio Controller" and disable audio in BIOS on next boot, then re-enable it after restarting a 2nd time and let Windows find the driver again.